Refillable fuse-plug.



P. H. KAISER.

REFILLABLE FUSE PLUG.

APPLICATION FILED OGT. a, 1911. RENEWED JAN. 10, 1913.

1,062,240, Patented May 20, 1913.

r. ll. 2 9 -2 JP in an E 1? E2 FRANK H. KAISER, OF BUFFALO, NEW YORK.

REFILLABLE FUSE-PLUG.

Application filed October 3, 1911, Serial No.

To all whom it may concern Be it known that I, FRANK H. KAISER,

citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improven'icnts in Refillable Fuse- Plugs, of which the following is a specification.

The izimary object of my invention is the proi'ision of a very simple, cheap and etlicient refillable fuse plug.

A further object is to provide a plug of this character in which the ends of the fuse wireare held in place by the caps.

A further object is to provide a plug of this character in which the ends of the fuse at its opposite ends.

wire are held in place between the caps forming the terminal ends of the plug and circular heads or washers interposed between the fiber insulating shell and the said caps.

Still another object is to provide a refrac tory sheathing inclosing the fuse wire and acting to smother the are when the fuse blows.

My invention is illustrated in the accompanying drawing, in which a Figure l is a perspective view of a fuse plug constructed in accordance with my in vention; Fig. 2 is a longitudinal diametrical section; and Fig. 3 is a perspective view of one of the caps and its accompanying washer and screw, separated.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawing by the same reference characters.

Referring to the drawing, 2 designates the usual cylindrical shell of hard fiber or other insulatin material, this shelf being open Mounted upon the ends of the shell and detachable therefrom are the caps 3. These caps are made of thin brass and are each provided with a depressed central portion 4 and a marginal flange or rim 5 which fits snugly around the adjacent end of the fuse plug. Through the center of the depressed portion 4 of the cap passes a screw 6.

lnterposed between the ends of the shell 2 and the caps 3 are circular heads or wash 'lhcse, as will be seen from Fig. 3 of the drawing. are each circular in form and provided with an upstanding n'iarginal flange t. The center of each washer or head 7 is slightly thickened and interiorly Specification of Letters Patent.

.the fiber shell.

the fuse wire from the washers 7,

Patented May 20, 1913.

652,556. Renewed January 10, 1913. Serial No. 741,348.

screw threaded for the passage of the screw 6. Each of the washers 7 is provided with a perforation 9 for the passage of the adjacent terminal end of the fuse wire 10. The fuse wire of course extends entirely through the shell 2 and its ends are passed through the perforations 9 and then angularly bent so as to lie against the outer faces of the washers or heads 7. The intermediate portion of the fuse wire is surrounded by an asbestos sheathing 11.

In assembling the fuse as above described,

the caps are removed from the shell 2 and the fuse wire placed within the shell, surrounded of course by the sheathing 11. The ends of the fuse wire are passed through the perforations 9 and. angularly bent down upon the heads or washers 7, as shown in Fig. 2, the washers rest-in loosely upon the ends of the fiber shell. The caps 3Vare then put in place and slipped over the ends of The screws 6 are then inserted and screwed home, thereby drawing the caps and washers or heads 7 toward each other and of course drawing the caps home, the capsbeing thus retained in position not only by their engagement with the fiber shell, but also by the engagement of the screws 6 with the heads or washers 7 which in turn are held in place by reason of the angularly bent ends of the fuse wire. The depressed central portion of each' cap will engage the adjacent angular-1y bent end of the fuse wire and the fuse wire will be clamped between the head or washer 7 and the cap, and the cap will thus have a thoroughly good electrical engagement with the fuse wire. It will be noted that when the screw 6 screwed home the head of the screw is entirely housed within the depressed portion 4 of the cap so that it does not project. beyond the capped end of the fuse plug.

It will be obvious that the fuse may be readily removed by removing the screws 6 and thus permitting the easy detachment of and that the fuse wire may be readily replaced when burned out. Furthermore it will be seen that the are caused by the blowing out of the fuse will be smothered by the asbestos sheathing 11.

It will of course he. noted that the central depressed portion 4 is less in exterior diameter than the interior diameter of the annular flange 8 of the washer 7, so that when latin shell, a fuse wire supported within the screw is turned the depressed portion may .fit down into the flange 8 and thus se- 6 and not only is the .fuse wire clamped between the brass-washer 8 and the cap 3, but by reason of the fact that the cap has an annular groove into which an annular flange on the washer fits, dust and dirt are prevented from working in through the cap and between the cap and washer might possiblypi-event a good eleetricah contact between the'cap and the fuse wire.

While I have shown what I believe to be thebest form of my invention, I' do not wish to be limited to these-specific details, as it is obviousithatmany changes might be made withoufi-i departing' from the spirit of the invention. I Having thus described the invention, what ls-claimedas new is: a

- 1. A fuse plug including a hollow insuthe s ell and having angularly'bent ends,

00 oii'niifidmthiy be obtained for five cents each, by addressing the Washington, D. C."

clamping members mounted upon the ends of the shell between which the angularly bent ends of the fuse wire are received, said shell, disk like Washers supportedone'at each end of the shell and having perforations through which the-ends of the fuse wire pass, said washers each having amarginal flange extending outward from th= shell, caps-at each end of the shell, each cahaving a marginal flange embracing the at jacent end of the shell, and a depressed C61, tral portion, and-screws for forcing saio caps toward the said washers and into clamping engagement-with theends of the fuse wire. v A i In testimony whereof I aflix my signature in presence of two Witnesses.

Witnesses:

DANIEL JUNG, CHAS. H. Noam.

f Commissioner of. Patents,

FRANK H. KAISER. [Ls] 

